MISSED PERIOD AFTER SMEAR NOT PREGNANT

I’m really looking for friendly help, reassurance/advice. (Awaiting doctors appointment) so we’ve been trying for a baby since July. (I’m 30) he’s younger. I experience some pain in the ovary area sometimes during sex. My periods have always been so regular. I had my smear test coming up 3 weeks ago, I was due on my period last Saturday but didn’t come on? A week after my smear I’ve had creamy pink discharge which is still ongoing. What’s happening to me ? took 3 tests, all negative.